VLF stands for Extremely Small Frequency and is similar technology Employed in detectors created for coins, jewelry, and relics. VLF detectors broadcast at frequencies calculated in kilohertz ranging from three kHz to 70 kHz. Here are 5 explanation why you could go with a VLF over a PI Our writers https://kisanlink.com/forums/discussion/agriculture-discussion/metal-detector-secrets-for-finding-coins